util: add script to generate service principal to ease testing

.gitignore

@@ -2,4 +2,4 @@ node_modules/
 /lib/
 *.dll
 /coverage/
-.env
+.env*

scripts/generate-service-principal.sh

@@ -0,0 +1,38 @@
+#!/bin/bash
+
+###
+# This script generate a service principal using your currently set subscription
+#   then write out the credentials of your new sp in a file 
+#   that you can export as environment variables
+###
+set -e
+
+if ! [[ -x "$(command -v jq)" ]]; then
+  echo "Please install [jq] before continuing -> https://stedolan.github.io/jq/download/.  Aborting."
+  exit 1
+fi
+
+SP_NAME=$1
+
+if [[ -z $SP_NAME ]]; then
+  SP_NAME="FunctionsTestingPrincipal"
+  echo "You didn't pass in a name for the service principal.  We'll use the default: ${SP_NAME}"
+  echo
+fi
+
+SUBSCRIPTION=$(az account show | jq .name)
+echo "You're using subscription: ${SUBSCRIPTION}"
+echo "--> Creating service principal with name: ${SP_NAME}"
+SP_RESPONSE=$(az ad sp create-for-rbac --name "http://${SP_NAME}")
+
+FILE=".env.servicePrincipal"
+
+echo "--> Writing creds to '${FILE}'"
+cat <<EOF >${FILE}
+export azureSubId=$(az account show | jq .id)
+export azureServicePrincipalTenantId=$(echo "${SP_RESPONSE}" | jq .tenant)
+export azureServicePrincipalClientId=$(echo "${SP_RESPONSE}" | jq .name)
+export azureServicePrincipalPassword=$(echo "${SP_RESPONSE}" | jq .password)
+EOF
+
+echo "Run \"source ${FILE}\" to set your Azure account credentials "